UMAX180800, 20 Thermocouple, 2 RTD, 4 Inputs, 6 Relays Dual CAN Controller
Version 1
Page: 21-71
Input Type
, the unit will use the value in
Input Range Min
and
Input Range Max
for the
diagnostic high and low limits. The ranges for that parameter depend on the
Input Type
and
can be found in the table below
Table 13. Options for Input Range Min and Max Ranges
Input Type
Range
0
Input Disabled
1, Voltage
0…10
2, Current
0…24
3, Digital
0…1
4, Frequency
0…10000
5, PWM
0…100
3.4 Thermocouple Input Function Block
The ECU has 20 Thermocouple inputs, which can be configured to read the input data and
react in a variety of different ways.
The first parameter,
Thermocouple Type
, is used to configure what type of Thermocouple the
input is.
Table 14: Thermocouple Types
Value Meaning
0
Input Disabled
1
B Type
2
E Type
3
J Type
4
K Type
5
N Type
6
R Type
7
S Type
8
T Type
3.4.1 Thermocouple Input Cold Junction Compensation
A high accuracy digital temperature sensor is placed next to thermocouple connectors to
provide cold junction compensation. Cold Junction Compensation can be enabled or disabled
for the Thermocouple Input using the
Cold Junction Enabled
setpoint. Regardless of this
parameter being enabled, output data from the cold junction will still be available as a control
source for outputs or other logic blocks.
3.4.2 Thermocouple Input Diagnostic Parameters
The
Generate Diagnostic Messages
, and
SPN for Diagnostics
setpoints are directly linked
to all Diagnostic blocks related to the Thermocouple. This serves as a way to unilaterally
change all these parameters at once for the affected diagnostics. Also, the ECU is able to
detect the Open Circuit Fault. See Section 3.14 for more details.
